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Pt−ZnO nanoflowers are prepared via a novel one-step hydrothermal route, and Pt nanoparticles are uniformly loaded on the whole surface of the nanoflowers. The growth mechanism of Pt−ZnO nanoflowers is proposed to be a four-stage process. With the help of Raman scattering, photoluminescence, and gas sensing measurements, it has been demonstrated that the optical and sensing properties of Pt−ZnO nanoflowers are greatly enhanced. The surface defects decrease, the concentration of bound excitons under UV illumination increases, and the surface adsorption is enhanced and accelerated. These probably arise from the chemical and electrical effect of Pt. Our results could provoke a promising direction to achieve higher optical and sensing properties of ZnO one-dimensional nanostructures.
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Chen et al. (2010) studied this question.
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